Motorola GP68, Руководство по обслуживанию

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4-6
6881086C09-O March, 1997
Radio Programming Information GP68 Portable Radios Service Manual
Programming the GP68 Radio
When the frequency step size passes the upper or
lower limit, the radio loops to the opposite limit and
sounds a
wrap-around tone.
Momentarily press the Enter Button to enter the dis-
played frequency step size and return to normal opera-
tion (the radio automatically does this after 5 seconds of
inactivity).
WARNING
The user-defined TX frequency may be
changed automatically without indication
depending on the change in the frequency
step size selected. To reset your user-defined
TX frequency, see
To Select the TX Offset
on page 4-7.
To Select a Receive Frequency
There are several ways to select a receive frequency:
• by entering the frequency directly via the numeric
keypad,
• by using the Channel Selector Knob /keypad combi-
nation.
Using the Keypad only
Enter the desired frequency directly using the number
buttons on the keypad.
The LCD is updated after each keypress.
NOTE
You have approximately 5 seconds between
each number entry; otherwise, the radio
reverts back to the previously selected fre-
quency.
With each number entry, a valid keypress tone
sounds. When 6 digits are displayed, the receiver
is set to the entered frequency.
NOTE
If an invalid number is pressed, the valid
number nearest the invalid keypress is
entered such that the selected frequency will
not be outside the allowed frequency band.
Valid frequencies entered via the keypad are
dependent on the frequency step size previ-
ously selected. The LCD only displays valid
numbers.
Using the Channel Selector Knob and Keypad
Together
Enter the first few digits of the desired frequency
directly using the number buttons on the keypad. The
LCD is updated after each keypress.
Press the Enter Button to commit the partially-entered
frequency. Un-entered digits are coerced to the nearest
valid frequency.
Rotate the Channel Selector Knob clockwise to
increase, or counter-clockwise to decrease, the fre-
quency (starting at the next available frequency) until
the desired frequency is displayed. The frequency incre-
ments, or decrements, according to the selected fre-
quency step size.
Figure 4-11 Selecting the Frequency Step Size.
Figure 4-12 Using the Keypad to Select a Receive Fre-
quency.
3
UHF
3
2
1
1 2 3
4 5 6
7 8 9
0
1
2
1
Figure 4-13 Using the Channel Selector Knob and Key-
pad to Select a Receive Frequency.
2
1
2
3
UHF
2
1
3